Keeping a list, now? Probably a good idea. Mine - [101st-M]MNS-Apparition - is still in occasional use.
I requested it from Director Moriarty a few months back, at a time when we didn't have our own, and it still works far better for my particular line of work than our own model. I'd rather not have to part with it.
I've also been trusted with a Falchion in the past by the Legion, and gave no reasons for it to be reclaimed - I did, however, send it back eventually, as I was more comfortable with my Scimitar.